Qrtrhrs, I think you are reffering to the "25132 XDR" , (xtra duty rating), the 25132 and the 25132XDR are 2 different hitches. You are correct, the 25132 is a lot cheaper than the XDR series, both are class Vs however the XDR is built different. I opted for the better of the two... its just a buck. I was surprised that grade 5 bolts are used in mounting why not 8? Also the bolts are completely threaded thus giving a fracture "zone", I changed them out for grade 8 bolts that are not threaded to the head. Overkill, but its worth the peace of mind.
Mike